EP1108154B1 - Wheel and/or brake disk hub and brake disk - Google Patents

Abstract

The invention relates to a wheel and/or brake disk hub (2) for receiving a one-piece or multi-piece, and notably fragmented, brake disk (1) having friction rings (5, 6) which are preferably connected via links (7). Said hub is configured such that cams (15) of the hub (2) have shoulders (22) which protrude radially outwards and on one side axially secure the brake disk (1) positioned on the hub (2). The brake disk is axially stepped at its inner periphery in such a way that a step (6') is formed which is supported on the shoulder (22).

Description

The invention relates to a brake disc assembly with a wheel and / or brake disc hub according to the preamble of claim 1.

A wheel and / or brake disc hub with the features a) to d) of the preamble of claim 1 is known from DE 195 44 559. To connect the Brake disc with the hub are intermediate elements for this brake disc Torque and power transmission from the cams of the hub to the Support elements of the disc are provided, which, for example, by bolts on the Cams of the hub are attachable.

On the one hand, the cams of the hub engage in the intermediate elements and on the other hand, the intermediate elements in the support elements, so that in both Direction of rotation a safe torque transmission from the brake disc to the Hub is guaranteed.

A disadvantage of this prior art is the rust-prone screw connection should be avoided if possible.

Such a wheel and / or brake disc hub for a brake disc for Commercial vehicles are also known from DE-A-197 26 674.

From DE-A-197 26 674 as the generic prior art, it is also known to realize the axial securing by rings that are in the grooves of the hub engage, the rings can also be integrally formed with the hub.

Starting from this prior art, the object of the invention, besides one further simplified installation also a particularly good ventilation of the brake disc to ensure.

The invention achieves this aim by the subject matter of claim 1.

The invention realizes a wheel and / or brake disc hub in which the Brake disc is extremely easy to assemble and / or disassemble because none Screw connections are provided.

Even after prolonged use under high load, it is still possible to easily Remove the brake disc from the wheel hub. In addition, the axial Fasteners "collar on the cam" and "graded brake disc circumference" the manufacture of the hub and the brake disc are molded so that separate Fastening means are omitted for at least one of the two axial directions. Therefore the at least one collar is integral with the axial end regions of the cams formed.

Because the air channels of the cams of the hub are axially from the axial outer sides of the Cam will open into an air gap between the friction rings of the brake disc compared to the generic prior art, the cooling of the brake disc improved, as an increased air supply from the inside of the hub into the air gap of the internally ventilated brake disc is realized.

Further advantageous variants of the invention are set forth in the remaining subclaims remove.

Fig. 1

eine Explosionsansicht einer erfindungsgemäßen Bremsscheiben/Nabenverbindung;

Fig. 2a

eine Draufsicht auf das Ausführungsbeispiel der Erfindung nach Fig. 1 im montierten Zustand;

Fig. 2b

eine Schnittansicht längs der Linie A-A in Fig. 2a;

Fig. 2c

eine Rückansicht des Ausführungsbeispiels der Fig. 2a;

Fig. 3a

eine Draufsicht auf ein weiteres Ausführungsbeispiel der Erfindung;

Fig. 3b

eine Schnittansicht durch das Ausführungsbeispiel der Fig. 3a.

The invention is described in more detail below with reference to the drawing using exemplary embodiments. It shows:

Fig. 1

an exploded view of a brake disc / hub connection according to the invention;

Fig. 2a

a plan view of the embodiment of the invention of Figure 1 in the assembled state.

Fig. 2b

a sectional view taken along line AA in Fig. 2a;

Fig. 2c

a rear view of the embodiment of Fig. 2a;

Fig. 3a

a plan view of a further embodiment of the invention;

Fig. 3b

a sectional view through the embodiment of Fig. 3a.

1 and 2 show a disc / hub connection with a brake disc 1, one Wheel hub 2, a plurality of intermediate elements 3 and a locking ring 4. Fig. 3 differs from this essentially in that the wheel hub 2 does not is integrally formed with or not simultaneously as a disc hub, but for pushing onto a separate hollow cylindrical wheel hub (not in Fig. 3 shown) serves what is related to production in different wheel hub designs can be advantageous.

Especially for heavy commercial vehicles with pneumatic disc brakes 1, has two friction rings 5, 6, the are connected to one another via webs 7. On the inner circumference of the brake disc 1 support elements 8 are formed, which are essentially trapezoidal from The inner circumference of the friction rings 5, 6 protrude inwards and for the supply of cooling air the inside of the brake disc 1 by itself essentially radially through the Support elements 8 extending openings 9 are penetrated, which the Supply of cooling air into the air gap 10 between the two friction rings 5, 6 allow and the towards the center of the brake disc in axial recesses 11 of Support elements 8 end, so that a cooling air supply through the Support elements 8 into the air gap 10 between the friction rings 5,6 is possible. The friction rings are axially between the support elements 8 graded that on the friction ring 6 a kind of paragraph 6 'to rest on an axial The securing element (see below) of the hub 2 is created.

The wheel hub 2 of FIGS. 1 and 2 consists of a pot-like, hollow cylindrical Section 12, which is internally threaded at one of its axial ends Bores 13 for (not shown here) bolts. To that of the Bores 13 facing away from the axial end of the hollow cylindrical section 12 is followed by another axial, hollow cylindrical section 14, at the Outer circumference radially outwardly projecting cams 15 are distributed.

The radially outwardly projecting cams 15 are in plan view of the Outer periphery of the disc hub 2 U-shaped, with between the legs of the U an air duct 16 is formed which extends from the radial outside of the cams 15 inclined to the radial of the hub 2, with the base leg of the U to Broadened hub interior. The air duct 16 ends in a rotating one Recess 17 at the axial end of the hub facing the brake disc 1 2. In this way, an air supply from the axial end face of the hub 2 through the Cams 15 can be realized through into the air gap 10 of the brake disc (see Fig. 2).

The recess 17 on the end face of the hub 2 is axially inwards and outwards outside each bounded by a circumferential collar 18 and 19, of which the outer collar 19 on its outer circumference with a circumferential annular groove 20 is provided. Each in the area of the cams 15 or - more closely - the Air channels 16 is the circumferential collar corresponding to the air channel width Provide incisions 21, which result from the fact that both the cams 15 and the air channels 16 are also formed in one piece from the material of the hub 2.

The bracket-like intermediate elements 9 have a U-shape or one Base leg 23 and two longitudinal legs 24, 25 oriented perpendicular thereto on, with the base leg 23 of the U cut in the middle and is reshaped that a first portion 23a of the base leg 23 the two Longitudinal legs 24, 25 of the U connects to each other and that two more Project sections 23b, c from the first section by 180 ° to the outside.

As can also be seen particularly well in FIGS. 1 and 2b, the cams 15 are the hub 2 each provided with a radially outwardly projecting collar 22, which the The base of the U-shaped cams is partially extended radially outwards. The meaning the frets 22 opens up as an axial securing of the brake disc 1 on the hub 2 2b, which is a section along the line A-A from FIG. 2a shows a section, in the upper area of FIG. 2b, by a cam 15 and is placed in the lower region of this figure by a support element 8.

As can be seen from the interaction of FIGS. 1 and 2a-c, the brake disc 1 on the brake disc hub 2 (also called brake disc carrier) axially can be pushed on, the grooves 15 and the support elements 8 in the circumferential direction mesh. The between the cams 15 and the support elements 8th remaining gaps 26 allow the side sliding on Intermediate elements 9 via the support elements 8 and thus a safe one Torque transmission from the support elements 8 via the intermediate elements 3 on the cams 15 of the hub.

After pushing the brake disc 1 onto the cams 15 of the hub 2 and after the insertion of the intermediate elements 3, the Sicherheitsnng 4 in the annular groove 20th inserted from which it protrudes axially outwards. Lay in an axial direction thus the frets 22, which on inner lugs 27 on the inner circumference of the disc the brake disc firmly. In the other axial direction, the Brake disc 1 fixed by circlip 4. A particular advantage of this type of Axial locking can be seen in the fact that there are no screw bolts to fix the brake disc on the hub are required, which may be necessary after prolonged operation can only be solved with difficulty or not at all.

LIST OF REFERENCE NUMBERS

brake disc

1

disc hub

2

intermediate elements

3

circlip

4

friction rings

5, 6

Stege

7

support elements

8th

openings

9

air gap

10

recesses

11

hollow cylindrical section

12

drilling

13

hollow cylindrical section

14

cam

15

air duct

16

recess

17

Federation

18

Federation

19

ring groove

20

cuts

21

Federation

22

base leg

23

longitudinal leg

24, 25

interspaces

26

internal approaches

27

Claims (7)

1. Brake disc unit including a wheel and/or brake disc hub for accommodating a one-part or multi-part, preferably non-continuous, brake disc (19), including friction rings (5, 6) preferably connected via cross-bars (7), wherein the following disc/hub connection is provided for connecting said brake disc (1) to said hub (2):

   (a) said brake disc (1) presents supporting elements (8) on its inner peripheral portion,

   (b) said hub (2) is provided with cams (15) on its outer periphery,

   (c) intermediate elements (3) are provided radially between said hub (2) and said brake disc (1) and distributed in the peripheral direction,

   (d) said intermediate elements (3) are placed over said cams (15) or supporting elements (8) in such a way that the longitudinal sections project into spaces (26) extending between said cams (15) and said supporting elements (8) in the peripheral direction so as to ensure a transmission of the braking momentum from said brake disc (1) to said hub (2),

   (e) wherein at least one of said cams (15) on said hub (2) presents a collar (22) radially projecting to the outside, which locks said brake disc (1) placed onto said hub (2) in an axial direction towards one side, with said at least one collar (22) being integrally formed on the axial terminal sections of said cams (15),
   characterised in that

   (f) said brake disc is axially stepped on the inner periphery in such a way that a step (6') will be created for bearing against said collar (22),

   (g) and said cams (15) on said hub are provided with air passages (16) that extend axially from the axial outer sides of said cams (15) and open into a clearance (10) of said brake disc (1).
2. Brake disc unit according to Claim 1, characterised in that the axial fixing of said brake disc towards that side of the brake disc, which is opposite to said collar (22), is realised by means of a retaining element (3) that is adapted to be inserted into a groove (20) in said hub (2).
3. Brake disc unit according to Claim 2, characterised in that said retaining element (3) is an open ring adapted to be inserted into said groove (20), which ring projects in a radial direction out of said groove (20) to the outside.
4. Brake disc unit according to any of the preceding Claims, characterised in that said intermediate elements (3) have a clip-like and substantially U-shaped configuration.
5. Brake disc unit according to Claim 4, characterised in that said intermediate elements comprise a main leg (23) as well as two longitudinal legs (24, 25) orthogonal thereon, which main leg is subdivided into several parts whereof a first part of said main leg (23) interconnects said two longitudinal legs (24, 25) of said U-shaped configuration, with two further parts being bent through 180° to the outside relative to said first part.
6. Brake disc unit according to any of the preceding Claims, characterised in that said air passages (16) are configured as recesses extending at an inclination relative to the plane of the brake disc so that said cams (15) on the outer periphery form some kind of "U" having a main side radially enlarging towards the inside.
7. Brake disc unit according to any of the preceding Claims, characterised in that said intermediate elements have a U-shaped configuration.

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